Long Term Incentive and Share Based Compensation Expense

No definition available.

Name:	akr_LongTermIncentiveAndShareBasedCompensationExpense
Namespace Prefix:	akr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum Percentage of Promote To Be Awarded as Share Based Compensation Awards. Promote is defined as the amount above a certain performance measurement threshold.

+ References

No definition available.

+ Details

Name:	akr_MaximumPercentageOfPromoteToBeAwardedAsShareBasedCompensationAwards
Namespace Prefix:	akr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percent of Awards Issued to Officers Subject to Performance Measures

+ References

No definition available.

+ Details

Name:	akr_PercentOfAwardsIssuedToOfficersSubjectToPerformanceMeasures
Namespace Prefix:	akr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Trustee Fee Expense

+ References

No definition available.

+ Details

Name:	akr_TrusteeFeeExpense
Namespace Prefix:	akr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of vesting of share-based compensation awards.

+ References

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Value, after forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 30

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6743629&loc=d3e3913-113898

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 30

-Section 35

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6418191&loc=d3e15009-113911

+ Details

Name:	us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 29, 30

-Article 5

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

LONG-TERM INCENTIVE COMPENSATION (Details) (USD $)	6 Months Ended			12 Months Ended		0 Months Ended								3 Months Ended			6 Months Ended		12 Months Ended	3 Months Ended
LONG-TERM INCENTIVE COMPENSATION (Details) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Feb. 28, 2014 Officer	Dec. 31, 2009 Senior Executives Long Term Investment Alignment Program	Dec. 31, 2009 Senior Executives Fund IV Long Term Investment Alignment Program	Feb. 28, 2014 LTIP Units Officer	Mar. 31, 2014 LTIP Units Kenneth Bernstein	Jun. 04, 2014 LTIP Units Trustee Vesting on first anniversary	Feb. 28, 2014 Restricted Stock Officer	Feb. 28, 2014 Restricted Stock Other Employees	Jun. 04, 2014 Restricted Stock Trustee	Jun. 04, 2014 Restricted Stock Trustee Vesting on first anniversary	Jun. 04, 2014 Restricted Stock Trustee Vesting over each of next three years	Jun. 30, 2014 LTIP Units and Restricted Stock	Mar. 31, 2014 LTIP Units and Restricted Stock	Jun. 30, 2013 LTIP Units and Restricted Stock	Jun. 30, 2014 LTIP Units and Restricted Stock	Jun. 30, 2013 LTIP Units and Restricted Stock	Dec. 31, 2013 LTIP Units and Restricted Stock	Jun. 30, 2014 LTIP Units and Restricted Stock Trustee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock issued during period, shares, share-based compensation, net of forfeitures (in shares)						326,230	114,198	1,518	918	10,527	17,118	6,276	10,842
Percent of awards issued to officers subject to performance measures			16.00%
Stock granted during period, value, share-based compensation, net of forfeitures															$ 11,900,000		$ 11,400,000
Share-based compensation expense	3,833,000	2,786,000												600,000			1,000,000
Long term incentive and share based compensation expense														1,600,000		1,300,000	3,000,000	2,600,000	500,000
Share-based compensation arrangement by share-based payment award, award vesting period													3 years
Share-based compensation arrangement by share-based payment award, award vesting rights, percentage											33.00%
Trustee fee expense																				$ 40,000
Maximum percentage of promote to be awarded as share based compensation awards				25.00%	10.00%